package com.sky.aspect;


import com.sky.annotation.AutoFile;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFileAspect {


    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFile)")
    public void autoFilePointCut() {}

    @Before("autoFilePointCut()")
    public void autofile(JoinPoint joinPoint) {
        log.info("开始自动填充公共字段");

        //获取当前被拦截方法的数据库操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFile annotation = signature.getMethod().getAnnotation(AutoFile.class);
        OperationType operationType = annotation.value();

        //获取方法的实体对象
        Object[] args = joinPoint.getArgs();
        if(args.length == 0 ||args == null) {
            return;
        }
        Object entity = args[0];

        //准备赋值
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();

        if(operationType==OperationType.INSERT){
            try {
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);

                setCreateTime.invoke(entity,now);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
                setCreateUser.invoke(entity,currentId);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
        else if(operationType==OperationType.UPDATE){
            try {
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);

            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }

    }

}
